内配型钢方钢管混凝土偏压构件受火全过程数值模拟

发布时间：2018-01-09 14:18

本文关键词：内配型钢方钢管混凝土偏压构件受火全过程数值模拟　出处：《工程力学》2015年S1期 　论文类型：期刊论文

【摘要】：内配型钢钢管混凝土构件由于其较高的承载力、较好的延性及耗能能力在工程实践中具有良好的发展前景,该文运用ABAQUS有限元软件,在合理选取钢材、混凝土本构热力模型的基础上,采用顺序热-力耦合的方法建立了内配型钢的方钢管混凝土偏心受压柱火灾全过程的数值模型,计算了其火灾全过程作用下的轴向荷载-位移曲线,分析了截面应变、应力的变化情况及火灾全过程作用下各组件的荷载分配情况,最后对影响极限承载力的主要因素进行了参数分析,发现火灾荷载比、升温时间比、长细比、荷载偏心率及钢管含钢率等因素对构件承载力的影响较为显著。
[Abstract]:Due to its high bearing capacity, good ductility and energy dissipation capacity, the internal steel tubular concrete members have a good development prospect in engineering practice. This paper uses ABAQUS finite element software. On the basis of reasonably selecting the constitutive thermal model of steel and concrete, the numerical model of the whole fire process of concrete-filled square steel tube (CFST) columns under eccentric compression is established by using the method of sequential thermal-mechanical coupling. The axial load-displacement curve under the whole fire process is calculated, and the variation of cross-section strain, stress and the load distribution of each component under the whole fire process are analyzed. Finally, the main factors affecting ultimate bearing capacity are analyzed. It is found that fire load ratio, heating time ratio, slenderness ratio, load eccentricity ratio and steel content ratio of steel pipe have a significant effect on the bearing capacity of members.
【作者单位】：兰州理工大学甘肃省土木工程防灾减灾重点实验室;
【基金】：国家自然科学基金项目(51468037) 甘肃省高等学校科研项目(2013A-032)
【分类号】：TU398.9
【正文快照】： HAN Yi,WANG Jing-xuan,WANG Wen-da(Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,Lanzhou University of Technology,Lanzhou,Gansu 730050,China)内配型钢钢管混凝土柱是指在空钢管中插入型钢然后向钢管中浇筑混凝土而形

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